rileyridez

iTrader: (3)

The one that I have is 2wd

rsz288

Excellent value! Complete with yoke. That's $150 alone. Coolant pipes another $50.

LSfan70s

hmmm.... seems that rileyridez and rsz288 are the same person....

I'm just kidding.

Pm sent to rileyridez.

rsz288

ha ha.....not that we know of LOL!

It it was in the same country I would have bought it already! I have people lining up for these!

pillboxesghost

iTrader: (28)

Just want to say that Daniel R. is a stand up guy. Evidently, initial purchaser had problem with down payment and I was 2nd in line.

Daniel was most helpful getting the tranny skidded & shipped. I can take advantage of a great corporate freight rate (I.E. $75.77 Memphis, TN to Wilmington, NC), but the skid has to be shipped from a business (or delivered to the nearest terminal). Excellent communication throughout the transaction.

Shipment arrived today, very nicely packed and 6l90e was exactly as described -- '07 Silverado 2500HD tranny having about 300 miles and complete with flexplate,'verter, dipstick, fluid lines and yoke.

This thing's going behind an '08 LS7 (540 miles) in a steel '32 Ford roadster.

Need to call Speartech and see if they'll modify my '07 TBSS harness w/E67 ECM or whether it's less expensive to buy the set-up outright.

Thanks again Daniel for a clean tranny at a affordable price!

tt69camaro

What OD GM trans is the strongest to put in a 70 Chevelle? I've been thinking of doing a conversion also and want to look into the best bang for the buck OD transmissions. What are the gears in a 4l80,6l80 and 6l90? What else is out there that will support high HP?
Thanks, Chris

rsz288

6L90 in a car is 555Hp/550lbft input, 885lbft output.

6L80 is 469Hp/439lbft input, 664lbft output.

Ratios in both : 4:1, 2.36:1, 1.53:1, 1.15:1, 0.85:1, 0.67:1

4L80 is 440lbft in, 885lbft out. So same input as 6L80, same output as 6L90.

First: 2.48
Second: 1.48
Third: 1
Fourth: 0.75

Info courtesy GM

tt69camaro

Thanks for the info, it looks like the 4l80 would work out best for me. OR, using my existing T400 and get a Gear Vendors for it. Any opinions on what is the better idea to go? The price will almost be equal.


Just curious, is the 6l80/90 much bigger physically?

rsz288

Have never seen a 4L80 in the flesh, but I do recall seeing a thread on here somewhere maybe of a 6L80 and 4L80 side by side. Though it may be somewhere else on the net too.

Also TCI has a new 6 speed auto in a case either similar to a 4L80 or 4L65. Not quite sure on that.

Have read good things about Gear Vendors units!

What is a Chevelle tunnel like? Plenty of room or tight?

Cheers.

tt69camaro

I have read the 4L80E will fit without modification.

tt69camaro

Does the 4L80E rob any more power than the T400?

Bo185

The 6l80 is about the same length as a 4l60, a little shorter actually, but is alot bigger diameter. The 6l90 is about the same length as the 4l80 and larger diameter.

The TCI is a Gm 4l80 moded for the extra gears.

flamin1956

Is it true that there is a different case in the cars vs. trucks. For instance, is the tranny from a Denali the same as the new Camaro or G8?

Thanks,

Clay

rsz288

As far as I know, the main case is generally the same, though with GM variants can pop up at any time.

The difference is generally the converter housing, and the extension housing on the back. Various lengths and types of output shafts and transaxle/transfer case adaptation is used depending on regular car (G8), Corvette, 2WD or 4WD truck. (etc)

Trust this helps.

flamin1956

We are seriously considering a 6L80 out of a Denali in our 68 Firebird with a Mast controlled L99. I need to talk to Shaun at Mast about their L92/6L80 truck build, because I am concerned about the amount of control that we will have over the trans using their controller. I read your posts above about a billion times and have tons of questions. Did you have an estimate of how far back the tunnel needs to be modded. When installing the new floor we made some mods for posibly running a T-56 using the BRP kit, but I don't know if we have allowed enough room for the monster 6L80- see pics below. Also, Can you confirm what type of LS engine oil pans you're using - H3, F-Body, aftermarket..., and does the G8/VE 6L80 pan actually hang lower than the engine oil pan?









Thanks again!

rsz288

It really depends on which engine mount kit you use, but in our case here the rear of the trans for a 6L90 sits roughly in line with the trans cross member recess which is stamped into the floor and is shown in your pics approx half way between the seat re-inforcement and where the toe board and floor lines intersect.

The 6L90 case is about 1 1/4" longer than the 6L80.

An ATS mount kit was used, and the frame stands were moved 1/2" forward. So a 6L80 case in stock ATS location would have the rear of the case just in side the rear of where the trans x member recesses are (in theory )

It looks like you will have good space with that new tunnel top and the additional room allowed for around the converter housing.

Used an F Body pan sectioned for the steering centre link.

The 6L80 G8 trans pan is level with a G8 oil pan (or near enough), but it is lower than the F Body pan by around 3/4" - 7/8".

Just got these underside shots done last week (after promising them for some time LOL !):

Full length picture:



Shot showing relationship of shallow G8 trans pan to F Body Oil Pan and Front Cross member.



Regardless of whether you use a MAST ECM or GM ECM for the engine, the trans controller is running the trans. The important thing is that the MAST speaks the right language on the CAN (like the GM controller) so that the trans controller (TCM) can provide inputs to the ECM and vice versa and keep the TCM from going into limp mode, manage torque on shifts, tell the trans what the engine speed is etc. i.e. it thinks it is talking to a TCM aware GM ECM.

Dont know if the M90 does rpm matching/throttle blipping like the Corvettes/G8's for manual down shifting for example, but if they dont, would guess it wont be long before they do.

Trust this helps man.

rsz288

FYI - Photo shows F Body pan and dimensions in the foreground, G8 Pontiac (VE Commodore) in the background attached to the L98 crate motor (LS2 low end, ~LS3 top end).

F Body pan looks larger due to being closer to camera. The G8 pan is however considerably larger in depth and length, not withstanding the standard block pan rail dimensions.



Cheers.

55ChevDelray

Did you use EFI live to program and what version software? I'm doing a similar conversion. LS3 and 6L90 into a 55 chevy. Any tips you could share on getting everything to work?

Brian

rsz288

Hi Brian,

Yes EFILive is used. Currently available version.

Cheers.

55ChevDelray

Cool. Then it's possible for me to do it, if I purchase it and learn to use it..